A Simple Model Predictive Control for Buck Converter Operating in CCM

A predictive control based on simplified discrete model is presented for Buck converter operating in CCM. The calculation of control decision is simple. The discrete model of converter is simplified by linearizing the model coefficient matrix. The predictive control value is deduced by substituting model states into objective function and minimizing the objective function. According to the error between the model output and the actual system output, the control error caused by the model simplification and the system parasitic parameters is modified only by adjusting the expected values in the objective function. Simulation and experiment results validate that the predictive control strategy can be realized online adopting digital way and the output voltage of converter can be controlled with fast and accurate response on various work conditions.